<template>
  <div>
    <el-card class="box-card">
      <div slot="header" class="clearfix">
        <span>文章列表</span>
      </div>
      <!-- 搜索区域 -->
      <div class="search-box">
        <el-form :inline="true" :model="q">
          <el-form-item label="文章分类">
            <el-select v-model="q.cate_id" placeholder="请选择分类" size="small">
              <el-option :label="item.cate_name" :value="item.id" v-for="item in cateList" :key="item.id"></el-option>
            </el-select>
          </el-form-item>
          <el-form-item label="发布状态" style="margin-left: 15px;">
            <el-select v-model="q.state" placeholder="请选择状态" size="small">
              <el-option label="已发布" value="已发布"></el-option>
              <el-option label="草稿" value="草稿"></el-option>
            </el-select>
          </el-form-item>
          <el-form-item>
            <el-button type="primary" size="small" @click="getArtList">筛选</el-button>
            <el-button type="info" size="small" @click="reset">重置</el-button>
          </el-form-item>
        </el-form>
        <!-- 发表文章的按钮 -->
        <el-button type="primary" size="small" class="btn-pub" @click="pubVisible = true">发表文章</el-button>
      </div>

      <!-- 文章表格区域 -->
         <el-table
          :data="artList"
          style="width: 100%">
          <el-table-column
            prop="title"
            label="文章标题"
            >
            <template v-slot="{row}">
              <el-link type="primary" :underline="false" @click="updateArt(row.id)">{{row.title}}</el-link>
            </template>
          </el-table-column>
          <el-table-column
            prop="cate_name"
            label="文章分类"
            >
          </el-table-column>
          <el-table-column
            label="时间">
            <template v-slot="{row}">
              {{FormData(row.pub_date)}}
            </template>
          </el-table-column>
          <el-table-column
            prop="state"
            label="状态">
          </el-table-column>
          <el-table-column
            label="操作">
            <template v-slot="{row}">
            <el-button type="danger" @click="remove(row.id)">删除</el-button>
            </template>
          </el-table-column>
        </el-table>
      <!-- 分页区域 -->
      <el-pagination
      @size-change="handleSizeChange"
      @current-change="handleCurrentChange"
      :page-sizes="[2, 3, 5, 20]"
      :page-size="q.pagesize"
      :current-page="q.pagenum"
      layout="total, sizes, prev, pager, next, jumper"
      :total="total">
    </el-pagination>
      <el-dialog
          title="提示"
          :visible.sync="pubVisible"
          width="30%"
          :before-close="handleClose"
          fullscreen
          @closed="ced"
          >
           <el-form :model="pubForm" :rules="pubFormRules" ref="pubForm" label-width="100px">
            <el-form-item label="文章标题" prop="title">
              <el-input v-model="pubForm.title" placeholder="请输入标题"></el-input>
            </el-form-item>
            <el-form-item label="文章分类" prop="cate_id">
              <el-select v-model="pubForm.cate_id" placeholder="请选择分类" style="width: 100%;">
                <el-option v-for="item in cateList" :key="item.id" :label="item.cate_name" :value="item.id"></el-option>
              </el-select>
            </el-form-item>
            <el-form-item label="文章内容" prop="content">
              <quill-editor v-model="pubForm.content" @blur="$refs.pubForm.validateField('content')"></quill-editor>
            </el-form-item>
            <el-form-item label="文章封面" prop="cover_img">
              <!-- 用来显示封面的图片 -->
              <img v-if="preview" :src="preview" alt="" class="cover-img" ref="imgRef" />
              <img v-else src="../../../assets/images/cover.jpg" alt="" class="cover-img" ref="imgRef" />
              <br />
              <!-- 文件选择框，默认被隐藏 -->
              <input type="file" style="display: none;" accept="image/*" ref="iptFileRef" @change="hImg"/>
              <!-- 选择封面的按钮 -->
              <el-button type="text" @click="$refs.iptFileRef.click()">+ 选择封面</el-button>
            </el-form-item>
            <el-form-item prop="state">
              <el-button type="primary" @click="cPub('已发布')">发布</el-button>
              <el-button type="info" @click="cPub('草稿')">存为草稿</el-button>
            </el-form-item>
          </el-form>
        </el-dialog>
        <!-- 文章详情 -->
        <el-dialog
        title="文章预览"
        :visible.sync="artVisible"
        width="80%">
        <h1 class="title">{{ updateArtList.title }}</h1>

        <div class="info">
          <span>作者：{{ updateArtList.nickname || updateArtList.username }}</span>
          <span>发布时间：{{ FormData(updateArtList.pub_date) }}</span>
          <span>所属分类：{{ updateArtList.cate_name }}</span>
          <span>状态：{{ updateArtList.state }}</span>
        </div>

        <!-- 分割线 -->
        <el-divider></el-divider>

        <img :src="'http://www.liulongbin.top:3008' + updateArtList.cover_img" alt="" />

        <div v-html="updateArtList.content"></div>
      </el-dialog>
    </el-card>
  </div>
</template>

<script>
import dayjs from 'dayjs'
export default {
  name: 'ArtList',
  data() {
    return {
      artVisible: false,
      total: 0,
      cateList: [],
      artList: [],
      updateArtList: [],
      // 查询参数对象
      pubVisible: false,
      preview: '',
      q: {
        pagenum: 1,
        pagesize: 2,
        cate_id: '',
        state: ''
      },
      pubForm: {
        title: '',
        cate_id: '',
        content: '',
        cover_img: '',
        state: ''
      },
      pubFormRules: {
        title: [
          { required: true, message: '请输入文章标题', trigger: 'blur' },
          { min: 1, max: 30, message: '文章标题的长度为1-30个字符', trigger: 'blur' }
        ],
        cate_id: [{ required: true, message: '请选择文章标题', trigger: 'change' }],
        content: [{ required: true, message: '请输入文章标题', trigger: 'blur' }]
      }
    }
  },
  methods: {
    async updateArt(id) {
      const { data: res } = await this.$http.get('/my/article/info', { params: { id } })
      if (res.code !== 0) return this.$message.error(res.message)
      this.updateArtList = res.data
      this.artVisible = true
    },
    remove(id) {
      this.$confirm('此操作将永久删除该文章, 是否继续?', '提示', {
        type: 'warning'
      }).then(async() => {
        const { data: res } = await this.$http.delete('/my/article/info', { params: { id } })
        if (res.code !== 0) return this.$message.error(res.message)
        this.$message.success(res.message)
        if (this.artList.length === 1 && this.q.pagenum > 1) {
          this.q.pagenum--
        }
        this.getArtList()
      }).catch(() => {})
    },
    reset() {
      this.q = {
        pagenum: 1,
        pagesize: 2,
        cate_id: '',
        state: ''
      }
      this.getArtList()
    },
    ced() {
      this.$refs.pubForm.resetFields()
      this.$refs.iptFileRef.value = ''
      this.pubForm.cover_img = ''
      this.preview = ''
    },
    handleSizeChange(val) {
      // console.log(`每页 ${val} 条`)
      this.q.pagesize = val
      this.q.pagenum = 1
      this.getArtList()
    },
    handleCurrentChange(val) {
      // console.log(`当前页: ${val}`)
      this.q.pagenum = val
      this.getArtList()
    },
    handleClose(done) {
      this.$confirm('确认关闭？')
        .then(_ => {
          done()
        })
        .catch(_ => {})
    },
    hImg(e) {
      const file = e.target.files[0]
      if (file) {
        const fr = new FileReader()
        fr.readAsDataURL(file)
        fr.onload = e => {
          this.pubForm.cover_img = file
          this.preview = e.target.result
          // console.log(e.target)
        }
      } else {
        this.$refs.pubForm.value = ''
        this.pubForm.cover_img = ''
        this.preview = ''
      }
    },
    async getCateList() {
      const { data: res } = await this.$http.get('/my/cate/list')
      this.cateList = res.data
    },
    cPub(state) {
      this.pubForm.state = state
      this.$refs.pubForm.validate(async valid => {
        if (!valid) return
        // 发送请求
        // http 协议: 超文本传输协议
        // 在 http 协议下传输数据只支持两种格式: 文本 / 二进制
        // 由于互联网上传输的数据类型非常非常多
        const fd = new FormData()
        for (const k in this.pubForm) {
          fd.append(k, this.pubForm[k])
        }

        // Object.keys(this.pubForm).forEach(k => fd.append(k, this.pubForm[k])
        // 如果传入的就是Form data 对象, axios会自动设置 Content-type 为: multipart/form-data
        const { data: res } = await this.$http.post('/my/article/add', fd)
        if (res.code !== 0) return this.$message.error(res.message)
        this.$message.success(res.message)
        // 关闭弹出框
        this.pubVisible = false

        // 清空表单
        this.$refs.pubForm.resetFields()
        this.preview = ''
        this.getArtList()
      })
    },
    async getArtList() {
      const { data: res } = await this.$http.get('/my/article/list', { params: this.q })
      this.artList = res.data
      this.total = res.total
    },
    FormData(date) {
      return dayjs(date).format('YYYY-MM-DD HH:mm:ss')
    }
  },
  created() {
    this.getCateList()
    this.getArtList()
  }

}
</script>

<style lang="less" scoped>
.search-box {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  .btn-pub {
    margin-top: 5px;
  }
}
/deep/ .ql-editor{
  height: 300px;
}
</style>
